Hi,

There is no hard rule for studying forst organic or inorganic.For the chemistry paper of class 12 you can prepare according to what suits you best. The most important thing is what you study should be retained in your memory.

Often the reactions in chemistry require practice and revision. So start with what you like. You can alternatively cover the units i.e. one from organic then from inorganic.

If you face problems in studying you can then read basics for that topic/ point to clear your concept.

Hope this helps. All the best.